Partition member for total heat exchange element, total heat exchange element using this member, and total heat exchange type ventilation device

Abstract

A partition member for total heat exchange element ( 14 ) includes an ultrafine fiber portion ( 17 ) on a porous sheet ( 18 ). The ultrafine fiber portion ( 17 ) is impregnated with or coated with a moisture permeable substance ( 21 ), and water-insolubilized.

The invention claimed is: 
     
       1. A partition member for total heat exchange element, the member comprising:
 a porous sheet; and 
 an ultrafine fiber portion provided on the porous sheet, the ultrafine fiber portion comprising ultrafine fibers having a fiber diameter of 0.1 μm or more and 3 μm or less, 
 wherein the ultrafine fiber portion is impregnated with or coated with a water insoluble moisture permeable substance, and 
 wherein the ultrafine fiber portion includes ultrafine fibers which retain a moisture permeable substance by capillary force. 
 
     
     
       2. The partition member for total heat exchange element according to  claim 1 , wherein
 the porous sheet has an average pore diameter of 15 μm or more and 100 μm or less and a thickness of 20 μm or more and 500 μm or less, and 
 the ultrafine fiber portion has an average pore diameter of 0.01 μm or more and 10 μm or less and a thickness of 0.5 μm or more and 20 μm or less. 
 
     
     
       3. The partition member for total heat exchange element according to  claim 1 , wherein the water insoluble moisture permeable substance comprises a macromolecule of a low-molecular-weight hydrophilic organic compound, the macromolecule being impregnated or coated on the ultrafine fibers, and the macromolecule being produced by polymerization of the low-molecular-weight hydrophilic organic compound. 
     
     
       4. The partition member for total heat exchange element according to  claim 1 , wherein
 the porous sheet contains a heat-fusing component, and 
 the porous sheet and the ultrafine fiber portion are thermally bonded to each other by the heat-fusing component. 
 
     
     
       5. The partition member for total heat exchange element according to  claim 1 , wherein the water insoluble moisture permeable substance includes a quaternary ammonium group. 
     
     
       6. The partition member for total heat exchange element according to  claim 4 , wherein the heat-fusing component is a polymer having a hydrophilic group. 
     
     
       7. The partition member for total heat exchange element according to  claim 1 , wherein the porous sheet is structured of a sheath-core composite including a low-melting point component capable of thermally fusing in its outer layer and a high-melting point component in its inner layer. 
     
     
       8. A total heat exchange element using the partition member for total heat exchange element according to  claim 1 . 
     
     
       9. A total heat exchange type ventilation device using the total heat exchange element according to  claim 8 .